What is the best way to store double dimension vector in c++?

What is the best w开发者_如何学运维ay to store double dimension vector in c++?

std::vector <std::vector <int> > m_vector(N, std::vector<int>(M));
...
int k = m_vector[i][j];

How else?

The most efficient and most convenient at the same time is to use boost::multi_array.

As far as I know this is the BKM (Best known method). It's the most straight forward and it does what you need, with easy access using the [][] operator. You can always use set<> or list<> if you don't need vector's extra functionality...